Tag: Earth’s crust
Fractional crystallization: what is it?
The magmatic rocks that make up the majority of the Earth’s crust come from the crystallization of liquids magmatic, at the surface or at depth. Surface crystallization leads to the…
Accretion prism: what is it?
A prism ofaccretion represents a structure of tectonic origin linked to the accumulation of sediments at the level of a subduction. Scaling and sediment build-up In subduction zones, the oceanic…
What drives plate tectonics?
The outer part of the Earth is divided into different rigid units called lithospheric plates. These plates have the ability to move above the asthenosphere. They can thus fragment, move…
Gneiss: what is it?
The gneiss is a metamorphic rock composing the continental crust. It mainly contains quartz, micas, feldspars plagioclases and sometimes alkaline feldspars. The color of the rock is variable, but often…
This map betrays the magnetic signatures of the telluric forces that shaped the Earth
The map of the Earth’s magnetic field has been enriched with a new model making it possible to better understand the thermal state of the Earth’s crust, to perceive the…
Listen to the sound of the Earth to build an accurate image
How to image the interior of the earth’s crust? Seismic imagery provides solutions but its depth of investigation remains limited. However, researchers have just developed a new method based on…